Finding the Fourth Proportional to 1,986.02, 2,978.14 and 1,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.02 : 2,978.14 = 1,061.40 : x
2. Step 2: Convert to fraction form
   1,986.02/2,978.14 = 1,061.40/x
3. Step 3: Cross multiply
   1,986.02x = 2,978.14 × 1,061.40
4. Step 4: Simplify right side
   1,986.02x = 3,160,997.80
5. Step 5: Solve for x
   x = 3,160,997.80/1,986.02
6. Step 6: Final answer
   x = 1,591.62